Nut lock



July 31, 1923. 1,463,377 M. G. STACKHOUSE v NUT LOCK Filed Jan. 4. 1921 Patented July 31, 1923. j

a CORPORATION on DELAWARE.

a NUT LOcKi Application filed January 4, 1921, Serial NO. 434,891.

such conditions as to prevent the displacement or removal of the nut except by mutilating or destroying the same; and furthermore to provide a device for the purpose indicated which can be operated in the locking of the nut with the minimum of effort and loss of time upon the part of the operator, and moreover to provide alocking means which can be applied to the nut when manufactured with the minimum of modification in the construction of the nut, and hence without materially adding to the cost thereof; and with these objectsin view the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawings, wherein Figure 1 is a view of a nut provided with a locking device embodying the invention as seen before the locking operation is ef-' fected.

Figure 2 is a similar view showing the lock in the engaged position.

Figure 3 is an inverted plan view of a nut provided with looking elements embodying the invention, one of the elements being shown in its normal or retracted position and the other in its locking or enga ed positicn. I V

Figure 4 is a vertical sectional view taken in the plane of the locking elements.

Figure 5 is a section on the line'55 of Figure 4.

The locking device, of which any desired number may be used inconnection with a nut such as that indicated at 1.0, consists of a hard metal web or blade 11 fitted in a radial kerf 12 formed in the under or inner 5 surface of the nut, the walls of the kerf being disposed in overlapping relation with the bottom edges Of the blade, being pinched together to 'frictiOna-lly hold the same in position with the inner end of the blade 1 adjacent to the bolt opening 12 and with the outer end thereof projecting beyond the angle orcorner of the nut so as to be accessible by means of a hammer or like driving tool serv ng to impart a longitudinal movement radial y of the nut to the blade or web to, cause the impingement of the inner end thereof upon the threads of the bolt shown 7 at 14, or the embedding of the said inner end in the threads of the bolt to lock the nut against rotary movement. 1

In practice the nuts may be placed on the market in the form indicated in Figure 1 with theouter ends of the blades or webs projectlng, so that the nuts may be applied to the bolts in the ordinary way-,and' screwed to an adjustment suiting the obect 1n connection with which the bolt is used,'whereupon ablow of the hammer directed against the outer. end of the blade or web will cause the. inner end thereof to engage the threads of the bolt to secure an eflicient locking of the parts. The blade or web as'above indicated should be of a metal such as steel which is sufliciently harder than the metal of the bolt to adapt it to cut or impress the latter and thus lock the nut against displacement either through jarring or vibration or by applying force in an effort to reverse or unscrew the nut, so that the removal of the nut may be effected only by a mutilation thereof.

Being disposed asthey' are in bi-secting relation with the corners of the nut with their driving ends protruding beyond said corners, the operation of seating the blades 99 cry of the nut for impact by a driving tool,

the length of the blade exceeding the length of the kerf by an amount equal to the dis- 105 tance of penetration of the blade into the bolt to which the nut is attached. r

2. As an article of manufacture, a nu having in its inner-surface a radial kerf b'i an aincunt' equal to "the distance of penesecting an angle thereof and extending into tiat'idn of the blade into the bolt to which communication with the bolt opening, and a the nut is attached.- 10 blade fitted in said ke'rfvwithits-cutenend- Intestimony whereof he afixes his signa- 5 projecting beyond the angle ofthe nut :Ecr time. I

impact by a driving tool, the length of the blade exceeding the length of the 'ker'f by MILROY G. STACKHOUSE. 

